When building forms, displaying clear and actionable error messages helps users understand what went wrong and how to correct their input. A common approach is to show error messages directly below or next to the relevant input field as soon as a validation error occurs. You can also use visual cues like changing the border color of an input field to red or showing an icon to draw attention to the problem area. Always make sure the message is specific and tells the user exactly what needs to be fixed, such as "Email address is required" instead of a generic "Invalid input". This immediate, contextual feedback makes the form easier to use and helps users complete their tasks efficiently.

React Hook Form provides an errors object, which contains information about validation errors for each field. This object is structured so that each key corresponds to a field name, and its value is an object describing the error. Typically, this includes a type property (such as "required" or "minLength") and a message property containing the error message you want to display. For example, if a field called email fails the required rule, you might find errors.email with { type: "required", message: "Email is required" }. To provide user-friendly feedback, always check for the existence of an error for each field and display the corresponding message. Avoid showing all errors at once—focus on the fields that have been touched or are currently invalid. Keep your error messages concise, polite, and helpful, guiding users toward the correct input without overwhelming them.